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2 had listened

3 would have gone

4 i wouldn't have had

5 i had had

6 hadn't wanted

2 If he hadn't given it away, he might not have been poor when he died

3 If I hadn't been late, i might have had a better time (тут по смыслу вместо time должно было быть place)

4. If I had had a better camera, i wouldn't have taken better photos

5 If there had been an expert there, you might have understood them better

2 If I hadn't eaten too much last night, i wouldn't have felt sick

3 If I hadn't cut my own hair, my friends would not have laughed at me

4 If I had studied hard, i wouldn't have failed my exams

5 If I had remembered my girlfriend's birthday, she wouldn't have left me